<template>
  <div class="app-container">
    <h2 style="text-align: center;">发布新课程</h2>
    <el-steps
      :active="2"
      process-status="wait"
      align-center
      style="margin-bottom: 40px;"
    >
      <el-step title="填写课程基本信息" />
      <el-step title="创建课程大纲" />
      <el-step title="最终发布" />
    </el-steps>
    <el-button type="text" @click="openChapterDialog()">添加章节</el-button>
    <!-- 章节 -->
    <ul class="chanpterList">
      <li v-for="chapter in chapterVideoList" :key="chapter.id">
        <p>
          {{ chapter.title }}
          <span class="acts">
            <el-button type="text" @click="openVideo(chapter.id)">添加小节</el-button>
            <el-button style="" type="text" @click="openEditChapter(chapter.id)"
              >编辑</el-button
            >
            <el-button type="text" @click="removeChapter(chapter.id)">删除</el-button>
          </span>
        </p>
        <!-- 视频 -->
        <ul class="chanpterList videoList">
          <li v-for="video in chapter.children" :key="video.id">
            <p>
              {{ video.title }}
              <span class="acts">
                <el-button type="text">添加视屏</el-button>
                <el-button style="" type="text" @click="openEditVideo(video.id)" >编辑</el-button>
                <el-button type="text" @click="removeVideo(video.id)">删除</el-button>
              </span>
            </p>
          </li>
        </ul>
      </li>
    </ul>
    <el-form label-width="120px">
      <el-form-item>
        <el-button @click="previous">上一步</el-button>
        <el-button :disabled="saveBtnDisabled" type="primary" @click="next"
          >下一步</el-button
        >
      </el-form-item>
    </el-form>

    <!-- 添加和修改章节表单 -->
    <el-dialog :visible.sync="dialogChapterFormVisible" title="添加章节">
      <el-form :model="chapter" label-width="120px">
        <el-form-item label="章节标题">
          <el-input v-model="chapter.title" />
        </el-form-item>
        <el-form-item label="章节排序">
          <el-input-number
            v-model="chapter.sort"
            :min="0"
            controls-position="right"
          />
        </el-form-item>
      </el-form>
      <div slot="footer" class="dialog-footer">
        <el-button @click="dialogChapterFormVisible = false">取 消</el-button>
        <el-button type="primary" @click="saveOrUpdate">确 定</el-button>
      </div>
    </el-dialog>
    
<!-- 添加和修改课时表单 -->
<el-dialog :visible.sync="dialogVideoFormVisible" title="添加课时">
  <el-form :model="video" label-width="120px">
    <el-form-item label="课时标题">
      <el-input v-model="video.title"/>
    </el-form-item>
    <el-form-item label="课时排序">
      <el-input-number v-model="video.sort" :min="0" controls-position="right"/>
    </el-form-item>
    <el-form-item label="是否免费">
      <el-radio-group v-model="video.free">
        <el-radio :label="true">免费</el-radio>
        <el-radio :label="false">默认</el-radio>
      </el-radio-group>
    </el-form-item>
    <el-form-item label="上传视频">
      <el-upload
           :on-success="handleVodUploadSuccess"
           :on-remove="handleVodRemove"
           :before-remove="beforeVodRemove"
           :on-exceed="handleUploadExceed"
           :file-list="fileList"
           :action="BASE_API+'/eduvod/video/uploadAlyiVideo'"
           :limit="1"
           class="upload-demo">
    <el-button size="small" type="primary">上传视频</el-button>
    <el-tooltip placement="right-end">
        <div slot="content">最大支持1G，<br>
            支持3GP、ASF、AVI、DAT、DV、FLV、F4V、<br>
            GIF、M2T、M4V、MJ2、MJPEG、MKV、MOV、MP4、<br>
            MPE、MPG、MPEG、MTS、OGG、QT、RM、RMVB、<br>
            SWF、TS、VOB、WMV、WEBM 等视频格式上传</div>
        <i class="el-icon-question"/>
    </el-tooltip>
    </el-upload>
    </el-form-item>
  </el-form>
  <div slot="footer" class="dialog-footer">
    <el-button @click="dialogVideoFormVisible = false">取 消</el-button>
    <el-button :disabled="saveVideoBtnDisabled" type="primary" @click="saveOrUpdateVideo">确 定</el-button>
  </div>
</el-dialog>
  </div>
</template>
<script>
import chapter from "@/api/edu/chapter";
import video from "@/api/edu/video";
export default {
  data() {
    return {
      saveBtnDisabled: false, // 保存按钮是否禁用
      chapterVideoList: [],
      courseId: "",
      dialogChapterFormVisible: false,
      dialogVideoFormVisible:false,
      filelist:[],
      BASE_API:process.env.BASE_API,
      video:{
        title: '',
        sort: 0,
        free: 0,
        videoSourceId: '',
        videoOriginalName:'',
      },
      chapter: {
        title: "",
        sort: 0
      }
    };
  },
  created() {
    if (this.$route.params && this.$route.params.id) {
      this.courseId = this.$route.params.id;
      this.getChapterVideo();
    }
    this.getChapterVideo();
  },
  methods: {
    handleVodRemove(){
      video.deleteAliyunvod(this.video.videoSourceId)
        .then(response=>{
            this.$message({
            type: 'success',
            message: '删除视频成功!'
        });
        this.filelist=[]
        this.video.videoSourceId=''
        this.video.videoOriginalName=''

        })
    },
     beforeRemove(file, fileList) {
        return this.$confirm(`确定移除 ${ file.name }？`);
      },
      handleVodUploadSuccess(response,file,filelist){
        this.video.videoSourceId=response.data.videoId
        this.video.videoOriginalName=file.name
      },

      handleUploadExceed(){
        this.$message.warning('想要重新上传视频,请先删除已上传的视频')
      },
    removeVideo(id){
  this.$confirm('此操作将永久删除该小节, 是否继续?', '提示', {
        confirmButtonText: '确定',
        cancelButtonText: '取消',
        type: 'warning'
        }).then(() => {
      video.deleteVideo(id)
       .then(response=>{
            this.$message({
            type: 'success',
            message: '删除小节成功!'
        });
        this.getChapterVideo()
       });
        });
    },
      openVideo(chapterId){
        this.video={}
        this.dialogVideoFormVisible=true
        this.video.chapterId=chapterId
        
      },
      addVideo(){
        this.video.courseId=this.courseId
        video.addVideo(this.video)
        .then(response=>{
            this.dialogVideoFormVisible = false;
        this.$message({
          type: "success",
          message: "添加小节成功!"
        });
        this.getChapterVideo();
        })
      },
      openEditVideo(videoId) {
      this.dialogVideoFormVisible = true;
      video.getVideo(videoId).then(response => {
        this.video = response.data.getVideo;
        
      });
    },
      updateVideo(){
      video.updateVideo(this.video)
      .then(response=>{
         this.dialogVideoFormVisible = false;
        this.$message({
          type: "success",
          message: "修改小节成功!"
        });
        this.getChapterVideo();
      })
      },
      saveOrUpdateVideo(){
         if(!this.video.id) {
        this.addVideo();
      } else {
        this.updateVideo();
      }
      },
    removeChapter(chapterId){
       this.$confirm('此操作将永久删除该章节, 是否继续?', '提示', {
        confirmButtonText: '确定',
        cancelButtonText: '取消',
        type: 'warning'
        }).then(() => {
      chapter.deleteChapter(chapterId)
       .then(response=>{
            this.$message({
            type: 'success',
            message: '删除成功!'
        });
        this.getChapterVideo()
       });
        });
    },
    openEditChapter(chapterId) {
      this.dialogChapterFormVisible = true;
      chapter.getChapter(chapterId).then(response => {
        this.chapter = response.data.chapter;
      });
    },
    openChapterDialog() {
      this.dialogChapterFormVisible = true;
      this.chapter.title = "";
      this.chapter.sort = 0;
    },
    addChapter() {
      this.chapter.courseId = this.courseId;
      chapter.addChapter(this.chapter).then(response => {
        this.dialogChapterFormVisible = false;
        this.$message({
          type: "success",
          message: "添加章节成功!"
        });
        this.getChapterVideo();
      });
    },
    updateChapter() {
      chapter.updateChapter(this.chapter)
      .then(response=>{
         this.dialogChapterFormVisible = false;
        this.$message({
          type: "success",
          message: "修改章节成功!"
        });
        this.getChapterVideo();
      })
    },
    saveOrUpdate() {
      if(!this.chapter.id){
        this.addChapter()
      }else{
        this.updateChapter()
      }
      
    },

    getChapterVideo() {
      chapter.getAllChapterVideo(this.courseId).then(response => {
        this.chapterVideoList = response.data.allChapterVideo;
      });
    },
    previous() {
      console.log("previous");
      this.$router.push({ path: "/course/info/" + this.courseId });
    },
    next() {
      console.log("next");
      this.$router.push({ path: "/course/publish/" + this.courseId });
    }
  }
};
</script>
<style scoped>
.chanpterList {
  position: relative;
  list-style: none;
  margin: 0;
  padding: 0;
}
.chanpterList li {
  position: relative;
}
.chanpterList p {
  /* float: left; */
  font-size: 20px;
  margin: 10px 0;
  padding: 10px;
  height: 70px;
  line-height: 50px;
  width: 100%;
  border: 1px solid #ddd;
}
.chanpterList .acts {
  float: right;
  font-size: 14px;
}
.videoList {
  padding-left: 50px;
}
.videoList p {
  /* float: left; */
  font-size: 14px;
  margin: 10px 0;
  padding: 10px;
  height: 50px;
  line-height: 30px;
  width: 100%;
  border: 1px dotted #ddd;
}
</style>
